Y 0.08Sr 0.92Fe xTi 1-xO 3-δ perovskite for solid oxide fuel cell anodes

Jong Seol Yoon, Mi Young Yoon, Chan Kwak, Hee Jung Park, Sang Mok Lee, Kyu Hyoung Lee, Hae Jin Hwang

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

A single phase perovskite Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.05, 0.1,0 0.20, 0.25, 0.40, and 0.50) was fabricated at 1400 °C in air by a solid state reaction method and its electrical conductivity and electrochemical properties as an anode were investigated as a function of the Fe content. Doping with Y for Sr allowed the SrFe xTi 1-xO 3-δ perovskite to be stable at 800 °C in a reducing atmosphere. At 900 °C, metallic Fe precipitated and the stability of the perovskite phase under a reducing atmosphere decreased as the Fe content increased. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.40) was greater than that of the x = 0.20 sample. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ was found to be 2 × 10 -1 Scm -1 at 800 °C in H 2. Sintering the Y 0.08Sr 0.92Fe xTi 1-xO 3-δ anode at 1200 °C was found to be optimum to obtain not only good interfacial adhesion, but also a fine grain structure. The Y 0.08Sr 0.92Fe 0.25Ti 0.75O 3-δ anode exhibited the lowest polarization resistance (0.7 and 1.8 Ωcm 2 at 800 and 700 °C).

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume177
Issue number2
DOIs
Publication statusPublished - 2012 Feb 15

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Y <sub>0.08</sub>Sr <sub>0.92</sub>Fe <sub>x</sub>Ti <sub>1-x</sub>O <sub>3-δ</sub> perovskite for solid oxide fuel cell anodes'. Together they form a unique fingerprint.

  • Cite this